Kate is a highly skilled and respected FBI field agent, and if often picked to carry out some of the most dangerous and top secret missions. One day, when on a mission to investigate a possible terrorism attack in the form of a strange satellite that crash-landed in the Utah desert, she accidentally activates some sort of bomb that goes off and knocks her unconcious. During her recovery time off from work after the accident, she begins unwillingly shapeshifting into different horrible, alien monsters, all of which seem to be bent on destruction. At first she thinks that this could be good, that if she learned how to control herself she would be able to help her country even more. But after a while, she begins to realize that this might not be possible.
Ben 10: Multi Trixes
BTMT takes place in an alternate timeline compared to KUR, so a "not-so-happy-ending" timeline for Kate would end up in BTMT. (Which is ironic.) Nearing the time around the end of KUR, Kate has gone insane from her mutations, and has made a small alliance with some Nanochips. Eventually, she was mutated into a combo of all her mutations. In the end, she was cured of her mutations, although she still didn't like Ben.
- Kate's favorite animal is the butterfly. But she refuses to admit this because she thinks her coworkers wouldn't take her as seriously if they knew.